Profile

Current Rank	555
Best Rank	114 (19 Aug 2018)
Titles	8
Grand Slams	0
Main Tour	0
Masters	0
Tour Finals	0
Challengers	4
Futures	4

Recent Form

Age	35(14 Jun 1989)
Country	Chinese Taipei
Birthplace	Torrance, CA, USA
Height	5'11" (180 cm)
Weight	152 lbs (69 kg)
Plays	Right-Handed
Backhand	Two-Handed
Favorite Surface	I.hard 56%
Coach	Oliver Messerli
Turned Pro	2011
Player Status	Active

Upcoming Match

Performance Breakdown
career

Surface Breakdown

W/L

Overall	56.0%	403 / 317
Hard	58.5%	307 / 218
Clay	49.2%	31 / 32
Indoor	52.3%	45 / 41
Grass	43.5%	20 / 26

Round Breakdown

W/L

F	40.0%	8 / 12
SF	52.6%	20 / 18
QF	44.2%	38 / 48
3rd Round	68.8%	11 / 5
2nd Round	58.4%	90 / 64
1st Round	58.8%	134 / 94
QF	53.8%	28 / 24
Q2 round	54.3%	19 / 16
Q1 round	59.0%	62 / 43

Tournament Level Breakdown

W/L

Grand Slam	38.9%	14 / 22
Masters	18.2%	2 / 9
Main Tour	46.3%	37 / 43
Cups	40.0%	2 / 3
Challengers	54.6%	238 / 198
Futures	69.6%	119 / 52

Opponent Rank Breakdown

W/L

Vs No.1	0.0%	0 / 0
Vs Top.5	0.0%	0 / 0
Vs Top.10	0.0%	0 / 2
Vs Top.20	0.0%	0 / 3
Vs Top.50	21.4%	3 / 11
Vs Top.100	22.9%	11 / 37

Matches Played

Before:

	opponent		result	score	h2h
Nonthaburi 3 Challenger 14 Jan 24
SF	M. Gigante 7	Stats	L	6-3 7-5	H2H
QF	R. Peniston	Stats	W	6-4 6-3	H2H
R2	A. Dougaz	Stats	W	6-4 7-6(4)	H2H
R1	M. Jones WC	Stats	W	6-2 6-1	H2H
Nonthaburi 2 Challenger 07 Jan 24
R2	M. Guinard	Stats	L	6-1 7-6(7)	H2H
R1	N. Hardt q	Stats	W	6-4 6-2	H2H
Yokohama Challenger 19 Nov 23
R1	Y. Shimizu	Stats	L	6-4 7-5	H2H
Kobe Challenger 12 Nov 23
QF	T. Wu		L	6-4 6-3	H2H
R2	Y. Chung q	Stats	W	6-7(2) 6-3 4-1 ret.	H2H
R1	Z. Kolar 8	Stats	W	6-4 7-6(4)	H2H
Matsuyama Challenger 05 Nov 23
R1	Y. Shimizu	Stats	L	6-4 2-6 6-4	H2H
Rakuten Japan Open - Tokyo 15 Oct 23
Q1	T. Daniel q	Stats	L	6-7(1) 6-3 6-3	H2H
Shenzhen 1 Challenger 08 Oct 23
QF	P. Cachin 2	Stats	L	6-3 6-4	H2H
R2	J. Duckworth 5	Stats	W	3-6 7-5 6-2	H2H
R1	E. Donskoy	Stats	W	6-4 2-6 6-4	H2H
Shanghai Rolex Masters - Shanghai 01 Oct 23
Q1	B. Zhukayev q	Stats	L	4-6 6-3 6-3	H2H
Zhuhai Challenger 20 Aug 23
F	A. Weber	Stats	L	6-3 5-7 6-3	H2H
SF	Z. Li WC	Stats	W	7-6(3) 6-1	H2H
QF	R. Strombachs	Stats	W	6-4 6-2	H2H
R2	F. Sun	Stats	W	6-3 3-6 7-6(4)	H2H

Match Stats

Service Stats

Aces per Game	0.38	22 / 58
DFs per Game	0.17	10 / 58
1st Serve %	65.1%	233 / 358
1st Serve Win%	72.1%	168 / 233
2nd Serve Win%	55.2%	69 / 125
Serve Pts Win%	66.2%	237 / 358

Return Stats

Opp Aces per Game	0.71	41 / 58
Opp DFs per Game	0.26	15 / 58
Opp 1st Serve %	62.9%	241 / 383
1st Rtn Win%	30.7%	74 / 241
2nd Rtn Win%	52.1%	74 / 142
Rtn Pts Win%	38.6%	148 / 383

Break Points (Serve)

BPs Saved per game	0.31	18 / 58
BPs Faced per game	0.43	25 / 58
BP Save %	72.0%	18 / 25
Service Hold %	87.9%	51 / 58

Break Points (Rtn)

BPs Won per game	0.26	15 / 58
BPs Opps per game	0.69	40 / 58
BP Won %	37.5%	15 / 40
Opp Hold %	74.1%	43 / 58

Jason Jung interesting Heads to Heads

Federico Coria	H2H
Ernesto Escobedo	H2H
Chak Lam Coleman Wong	H2H

Daniel Evans	H2H
Adrian Mannarino	H2H
Fernando Verdasco	H2H

Surface Summary

year	sum.	hard	clay	i.hard	grass
2024	4/2	4/2	0/0	0/0	0/0
2023	42/25	40/23	0/1	2/1	0/0
2022	25/28	13/14	2/5	4/4	6/5
2021	12/25	5/12	1/4	2/6	4/3
2020	16/18	7/8	2/4	7/6	0/0
2019	39/30	30/20	1/1	7/5	1/4
2018	43/30	26/18	0/1	13/6	4/5
2017	22/28	14/17	4/3	2/4	2/4
2016	42/23	37/18	4/3	1/2	0/0
2015	32/28	25/18	1/1	3/5	3/4
2014	46/30	35/21	2/2	9/7	0/0
2013	52/25	38/17	11/5	3/2	0/1
2012	33/22	30/20	3/2	0/0	0/0
2011	0/2	0/2	0/0	0/0	0/0
2009	0/2	0/1	0/0	0/1	0/0
2008	0/3	0/2	0/0	0/1	0/0
2007	4/4	3/3	0/0	1/1	0/0
2006	0/1	0/1	0/0	0/0	0/0
2005	0/1	0/1	0/0	0/0	0/0

Singles Titles/Finals
2023

Titles

No Titles

Finals

Zhuhai Challenger (20 Aug 2023)

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5	Daniil Medvedev	5375 PTS
6	Andrey Rublev	4700 PTS
7	Taylor Fritz	4060 PTS
8	Hubert Hurkacz	4060 PTS
9	Casper Ruud	3965 PTS
10	Grigor Dimitrov	3840 PTS

Tennis Events This Week
	Shanghai Rolex Masters - Shanghai China
	Fairfield Challenger United States
	Hangzhou Challenger China
	Roanne Challenger France
	Valencia Challenger Spain
	Villa Maria Challenger Argentina
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